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<a href="./bianlianghechangliang/bianliang.php">测试变量</a>
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<a href="./panduanfenshu/panduan.php">判断语句</a>
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<a href="./bianlianghechangliang/changliang.php">测试常量</a>
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<a href="./bianlianghechangliang/bianliangbianliang.php">变量的变量</a>
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<a href="./register/reg.html">测试注册</a>
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<a href="./shifourunnian/shifourunnian.html">练习判断闰年</a>
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<a href="./panduanfenshu/cj.html">判断分数</a>
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